Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
thu hang » thi hang, thuc hanh, thu huong
va doanh » van doanh, vay doanh, va danh
tu sach » thu sach, su sach, te sach
van cua » vang cua, ban cua, dan cua
van lam » van nam
xuc va » duc va, tuc va, luc va
va lam » va lap
cua te » cua tu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((thu hang) OR (thu ban)) xa hoi. lieu ((va lam) OR (van lam)) xuc va doanh van cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((thu hang) or (thu ban)) xa hoi. lieu ((va lam) OR (van lam)) xuc va doanh van cua te~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((thu hang) or (thu ban)) xa hoi. lieu ((va lam) OR (van lam)) xuc va doanh van cua te*.